Door securing device



Sept. 10, 1935. P. HELBIG DOOR SECURING DEVICE Fil'ed June 17, 1935 2Sheets-Sheet 1 In ve zor' Atty/12 Sept. 10, was. P. HELBIG 2,013,779

DOOR SECURING DEVICE Filed June 17, 1933 I 2 sheetssheet 2 19 T70 eA/EvSPatented Sept. 10, 1935 imam;

DQOR SECURING DEVICE Paul Helbig, Berlin, Germany Application June 17,1933, Serial No. 676,225 In Germany June 25, 1933 1 Claim.

My invention relates to an automatic doorsecuring device. Such automaticdoor-securing devices, having one arm which rests on a spring and swingsat right angles to the direction of the main movement of the door, areknown in prior art, and automatic door-securing devices are also knownin which there is a fixed or turnable arm on the door and a slotted railis swingably mounted on the frame. In the last named form of device therail carries out a lateral movement and is acted on by a spring whichfrequently breaks because of the many strains to which it is subjectedand therefore requires replacement.

To improve the action of such devices it is necessary for the rail toswing easily about its pivot and also that the swinging movement thereofshall not exceed a certain amount.

These drawbacks are eliminated in a simple manner in accordance with thepresent invention by providing the rail with a ball-like projectionwhich seats itself in a corresponding hollow in the bearing plate andwith a recess in which lies a spiral spring surrounding the pivot andsupported by the bearing plate. In the displaced position, the rail isprevented from rising by means of angle-shaped stops provided on theframe or on the plate on the frame.

An example of the invention is illustrated in the accompanying drawingsin which Figure 1 is a front view partly in section of an automaticdoor-securing device.

Figure 2 is a fragmentary bottom view partly in section of the same.

Figure 3 is a bottom view of a key.

Figure 4 is a side view of the device.

Figure 5 is a perspective view of the device with some parts in adifferent position.

Figure 6 is a front View of the device, showing the rail disengaged fromthe arm.

Figures 7 and 8 are fragmentary plan views partly in sectionillustrating the action of the key.

In the construction shown in the drawings an arm I) on the door has aT-shaped projection c which engages a slot in the rail d which isswingably attached to a plate e provided on the frame 1. Two fixedbearing parts 9 and h are provided on the plate e and carry a fixedpivot i. The rail d is mounted on the pivot i and has a ball-likeprojection engaging in the plate part 9. The rail d also has a rim Zforming a recess which has one end of the spiral spring m lying on it.The spiral spring m is mounted at the opposite end on a sleeve nprovided on the pivot i.

The studs 0 serve to receive the key 11 which is shown in Figure 3 andis already known and serves to press the rail dback in order to enablethe door to be opened from outside.

An angle shaped stop piece q is adapted to be placed on the studs 0 andto engage the slot formed in the rail 1. The frame 1 carries an angleplate or stop piece 1 having a projecting hook s. In operation, when thestud 0 does not carry the key or the stop pieces, the door is free toswing to a limited extent, but is prevented from swinsging beyond thatextent, as shown in Figure The connection of the rail d with the plate edoes not prevent the door from swinging easily within the limitspermitted by the slot t. However, the projection Ic limits the extent ofmovement of the rail d when the door is closed. Due to the projection 7cthe rail (1 always assumes exactly the same position when the door isclosed.

If it is desired to use the rail d to lock the door from the insidewhile it is closed, the stop piece q is brought into engagement with theslot 12 and placed on the stud 0, as shown in Figures 1, 2

and 4.

Then the stop piece q prevents the rail d from moving sufficiently toopen the door. In this way the stop piece q functions as a night catch.

To open the door from the inside it is necessary after having removedthe stop piece q to move sideways the rail d until the projection 0becomes disengaged from the slot 13.

The described means of connecting the rail 01 to the plate e permit tocarry out this lateral rocking movement without damaging the rail or thespring. The projection k is used to maintain the rail in the correctposition to disengage the head 0 from the slot t.

The key 10 is provided with a shoulder u and a guide part 21. If it isdesired to open the door from the outside, the key 10 is placed on thestud while the door is partly open, as shown in Figure .5. Then the dooris closed and the rail dis moved along the guide part 27 until this railis brought into engagement with the shoulder u. The rail :1 forces thekey p to turn on the stud 0 through the position shown in Figure '7 tothe position shown in Figure '7. The turning movement of the key 10rocks the rail laterally until it becomes disengaged from the projectionc as shown in Figures 6 and 8. Then the door can be opened to the fullextent.

While the rail (1 is moved laterally into a position in which it isdisengaged from the arm b, the rail it engages the stop piece T whichprevents it from swinging, so that the rail d remains in a position inwhich it can again engage the arm b. By limiting the movements of therail 11 the stop piece 1' prevents the rail 11 from being injured.

When the stop piece q is placed upon the stud o, the key p is not used,since the piece q is used for preventing the opening of the door, i. e.as a "night catch, while the key 17 is used for opening the slotted raild. Obviously, either the rail q or the key p can be placed upon the stud0. Figure 4 shows the use of the piece q, by means of which the slottedrail 01 prevents the opening of the door, since the arm b projectsthrough the slot of the rail. When the key 10 is inserted, the rail d ispressed sidewise by the key p; in this position which is illustrated inFig. 8, the rail d is prevented by the hook s from rotating, so that thedoor can be conveniently opened and closed.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

A door securing device, comprising an arm carried by the door, aprojection forming a part of said arm, a bearing member having a recess,an oscillatable rail provided with a slot and having a ball-shapedprojection forming a part of said rail and adapted to project into saidrecess of the bearing member,- said rail being adapted to move laterallyand being located at the door frame, a 10 pivot carried by said bearingmember and passing through an opening formed in said rail, a springsurrounding said pivot and pressing against said rail, a stop piececarried by the door frame and adapted to engage said rail to prevent 15it from being raised, and a stud situated adjacent to said rail, saidstud being adapted to carry a piece engaging said slot in the rail tolock the door and also being adapted to carry a key moving said raillaterally to unlock the door. 20

PAUL HELBIG.

CERTIFICATE OF coRREcTIofi.

Patent No. 2,015,779. I September 10, 195! PAUL HELBIG.

It is hereby certified that error appears in the above numbered patentrequiring correction as follows: In the heading to the printedspecification, line 5, for the foreign filing date "June 25, 1955" readJune 25, 193.2;and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 14th day of April, A. D. 1936.

Leslie Frazer (Seal) Acting Commissioner of Patents.

